JPS6020239B2 - Rail mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a rail attachment device for use in securing cargo to the floor of an aircraft.

Generally, the floor of an aircraft is provided with a channel-like track having a plurality of parallel longitudinal slots along its length. These rails have seats or cargo mounting rhombuses arranged along the rails in any desired juxtaposition and at a distance of a predetermined distance. These mounting plates and their associated rails must generally be able to support a load of 1800 k9 vertically and 1600 k9 horizontally. One commercially available attachment device that meets these requirements includes a housing carrying a vertically movable pin and an operating handle at the front and a pair of screw-headed studs at the rear. . A stud with a screw head slides under the retaining lip of the rail, and the pin descends into the wide hole in the rail to prevent forward movement. A transverse hole is provided in the housing centrally between the studs for attaching the load. When the attachment device is attached to a seat, it is usually used only on the rear legs of the seat, so the forces acting on the attachment device in the broken state are usually forward and upward. These forces are resisted by the pin and the two studs, in which case most of the normal force is resisted by the rear stud' as the attachment attempts to rotate around the forward edge of the forward-mounted pin. . The front stud absorbs very little load until the track and rear stud begin to deform. When the loading system begins to fail, the aft stud is generally pulled off the rail and all vertical loads are transferred to the forward stud, which eventually also pulls away from the rail. Although the above-described attachment device is strong enough to be used on each of the two legs of a double-row seat, it may not be possible to use the same two-row seat as a double-row seat with one seat extending into the aisle between the seats.
3 with 3 seats that must be carried on individual rails
For example, it is not strong enough to support the seat. In lieu of the enormous expense involved in purchasing new aircraft, there is strong consideration for increasing the number of seats as a means of reducing fuel consumption per passenger mile. 8 consisting of 4 rows of multiple seats
In wide-space aircraft of the type that currently uses 9 side-by-side seating configurations, the number of passengers accommodated can be increased by using three-, four-, and two-seat configurations to create nine side-by-side seating configurations. Can be increased. However, the additional load given by using two-leg, three-seater seats for two-legged, double-row seats, or a pair of three-legged, four-seat seats for two-legged, double-row seats is limited to the distance between the front and rear legs of each seat. Requires that they must be approximately 56 arcs apart, not 4&ne. Generally seats only 81-9
Given that they are separated by a pitch of 1 or less, this narrowness of the seat space in front of the seats cannot fully accommodate the rear legs, which extend further back 10 togs. Alternatively, the seat rails in an aircraft could be replaced with more weight-bearing rails, but this would increase operating costs and reduce cargo capacity. One of the objects of the invention is to provide an aircraft track mounting system having a significantly greater load-carrying capacity than conventional mounting systems, so as to be able to support increased loads without increasing the fore/aft leg spacing. There is something to do.

Another object of the invention is to provide a rail mounting device that distributes the load relatively evenly over the length of the engaging portion of the rail. Another object of the invention is to provide a rail mounting system which, although slightly heavier than, for example, a conventional mounting system, provides a net weight savings by eliminating the use of much heavier leg members. It is on offer.

The above and other objects can be achieved by the rail mounting device of the present invention.

Four sets of load-receiving ears such that alternating ear members rotate about various support pins and pairs of ear members spaced five arcs apart rotate about an axis located therebetween. By forming the member on three pivot pins, this attachment device is able to distribute the load relatively evenly over the length of the rail. Therefore, this mounting device can withstand a load of 3175 k9 upwards and 21 gruel k9 forwards when applied to the rail. If such a load is applied over only 2.5 or 5 skins of the rail, the rail will fail. As the load increases, the ears tend to assume positions on circles of larger radius because they uniformly deform the rail into a similar shape. By using the track attachment system of the present invention in place of conventional attachment systems, three seats can be supported by only two rearwardly extending chests, or four seats can be supported by only three rearwardly extending chests; All of this can be done without increasing the leg spacing of either seat front to back.

By using this improved mounting device, the Douglas D
The special side-by-side 8-seat cabin of the C-1 topplane was arranged in 9 rows of 3 seats on each side of the cabin, 2 rows of 3 seats on the pond side, and 1 row of 4 seats in the middle, resulting in 227 seats.
This was a change from the previous 202 seats, which used two seats in total. This expanded capacity version uses 25 3-seats, 22 4-seats and 32 2-seats. Each 3 seats would require one of the improved track attachments disclosed herein, and each 4 passenger seat would require 2 of the improved rail attachments, all of which would require 6 improved rail attachments. The weight added to the aircraft by
However, as the weight of 22 legs, which is approximately 22.7k9, was reduced from the four seats, a weight saving of 10.9k9 was achieved. In addition to the weight savings gained by eliminating one rear leg from each of the four seats, passenger leg room was significantly increased by missing one leg. The present invention will be explained below with reference to the drawings.

In FIG. 1, an improved track mounting system 10 is shown in operative association with a slotted floor track 12 having a bottom wall portion, a side wall portion and a top wall portion, the top wall portion having a bottom wall portion, a side wall portion and a top wall portion. is formed with a plurality of circular or concave hollow holes 14 spaced 2.54 arcs apart on centers and separated by spaced lips 16, said lips 16 being narrow between opposite portions of the track. Blank space 1
form 7.

Track attachment device 10 includes a housing 18, preferably made of cast aluminum. The upper central portion of the housing 18 has a transverse hole 22 therethrough. Hole 22 is at the point where a load can be attached to the pick-up device, such as by a pin (not shown) passing through the hole. When the mounting device is used to support the rear legs of a seat, both sides of the legs extend generally in the direction shown by the arrows in FIG. 9 so as to overlie the holes 22 and are attached to the mounting device, for example by bolts. When the attachment device 10 is used to attach cargo to the floor of an aircraft, the cargo is attached to the hole 22 while attached to the attachment device using straps or cables secured to crepis-type members (not shown). be able to. A wear-resistant mounting plate 24, such as nylon, may be attached to the bottom of the housing to facilitate sliding of the mounting device over the upper track surface 26 of the floor track 12 during assembly and disassembly operations. When the attachment device 10 is used to individually attach a seat, the front and rear legs (not shown) of the seat are fitted with spacing members 28 attached to the attachment device by e.g. studs 29.
It is generally combined and tightened using . The spacing element 28 securely clamps the rear leg and the fixable attachment device 10 to the front leg, thereby making it unnecessary to provide a fixable attachment device to the front leg. A novel rail attachment device 10 that allows a relatively even load distribution over the entire length of the engaged rail is attached to the outer support plate 3.
0 and the inner support plate 32.

The outer support plate 30 carries a front outwardly extending projection 34 and a rear outwardly extending projection 36. Support plate 30
is installed to suppress to some extent the rocking movement around the pivot pin 38 including the roll pin. Swing of the support plate 30 about the pin 38 is limited by providing the support plate with an enlarged hole 40 surrounding a second pivot pin 48 carried in the housing 18. The inner support plate 32 has a front projection 4
4 and a rear projection 46, each projection extending outwardly to opposite sides of the support plate (see FIG. 6), unlike projections 34, 36 (FIG. 5), which extend outwardly to one side of the support plate. The inner support plate 32 is mounted for rocking movement about a pivot pin 48, in which case its allowable range of rocking movement is limited by an enlarged hole surrounding the pin 38 and formed in the support plate 32. Ru. As can be seen from FIGS. 1 to 3, the protrusions 64, 36 of the support plate 30 and the protrusions 44, 44 of the support plate 32,
46 are arranged alternately. The support plates 30 and 32 have pins 48
, 38, their rocking movement is restricted by the enlarged holes 40, 50 acting as stops for the projections 34, 3.
6, 44, and 46 are the positions shown in FIG. 3 when the load on the rail attachment device is slight or there is no load;
It can be moved to and from the position of FIG. 2, which shows the position in which the protrusion can be found under extreme heavy load conditions (FIG. 9), where the load is large enough to deform the track 12. 2 and 3, both the retracted and engaged positions of the pin 54 cooperating with the track 12 to prevent back and forth movement of the mounting device 10 are shown, respectively.

When the mounting device 10 is assembled to the floor rail 112, the pin 54 is raised upwardly by a bending member 56 which is pivotally attached to the upper eccentric handle member 58 through the pivot pin 6. When the handle 56 is raised from the position of FIG. 3 to the position of FIG. The pin 54 is aligned with the plate 66.
Keep them in the upright position. Pin 54 is attached to stud member 56 by pin 70 and includes a shoulder portion 72 that engages a spring 74 to bias pin 54 downwardly. The pin 54 is bifurcated to provide spaced track engagement surfaces 76 (see FIGS. 4 and 7) that span the inner and outer plates 32,30. 5 and 6 are cross-sectional views through the pivot pins 48 and 38, respectively, showing the support plate 30 of said pin.
, 32 and the enlarged holes 40, 501.

Figure 7 is a view of the bottom of the mounting device 10, and the mounting device is attached to the floor rail 1.
2 is an illustration of how to assemble the parts. Floor track 1
The assembly of the attachment device 10 to 2 is carried out as follows.

That is, by turning the handle 58 ○, the pin 54 is retracted as shown in FIG. 2, and the projections 34, 44,
36, 46 are lowered through the holes 14 in the track 12 so that the mounting plate 24 rests on the track top surface 26 (FIG. 1).
Next, the protrusion is placed on the underside of the retaining portion 16 of the track, and at the same time the entire mounting device 10 is moved back and forth approximately 1.3 inches so that the pin 54 is aligned with the pair of medium wide holes 14 in the track.
Handle 58 is then depressed to the position shown in FIG. 3 to move pin 54 downwardly under the force of spring 74 so that its lower outer surface 76 enters the already aligned respective hole 14. , engages its sides to prevent back and forth movement of the honoring device within the rail. FIG. 8 is a cross-sectional view of a track 12 of the type shown in FIG. 1, showing the assembly relationship between the retaining portion 16 and the protrusion 46 that prevents vertical movement of the mounting device.

The track 12 has a relatively deep groove 80 formed along its length which, in addition to providing support for the track mounting system, provides support for the several seats supported on the track 12. It serves as a conduit for cables carrying audible signals for internal service systems. In FIG. 8, the handle 18
The mounting rails 124 attached to the mounting rails 124 are a modification of the mounting plates 24 shown in other figures, which are made of metal and curved downward to cover both sides of the rails 12. The downwardly curved extension of this deformed mounting plate further provides additional retention force so that a protrusion such as protrusion 46 can be attached to the track when the protrusion and the attachment device are pulled upwardly by a load applied during fracture, for example. prevent it from being pulled away from the sides. Spacing member 2
8 also has lower bent twills which cover both sides of the rail attachment device 12 and provide the same retaining function as described above. FIG. 9 is exaggerated to clarify the relationship between the track attachment device 10 and the floor track 12 under maximum load conditions when this load is acting in the direction indicated by the arrows.

The pin surface 7 resists forward movement while the support plate 301
an outer protrusion 34 pivoted on a pivot pin 38;
36 applies an equal load to the first and third holding lips 16 that are alternately spaced among the four holding lips 16 that are successively arranged at intervals. Similarly, the protrusions 44, 46 engage the alternately spaced second and fourth retaining lips 16 and their support plates 3
2 about a pivot pin 48, thereby dividing the load between them.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of an embodiment of the present invention, Fig. 2 is a side view of a portion of the one shown in Fig. 1 with the pin retracted, and Fig. 3 shows the pin in the operating position. A side view similar to FIG. 2 of the condition, FIG. 4 a cross-sectional view taken along line 4--4 of FIG. 3, and FIG. 5 a cross-sectional view taken along line 5--5 of FIG. 6 is a cross-sectional view taken along line 6-6 in Figure 3, Figure 7 is a bottom view of Figure 3, and Figure 8 is an enlarged vertical cross-section of the main parts of the previous figures. FIG. 9 is a side view of the device shown in FIG. 1, showing an extreme load condition. 10...Rail mounting device, 12...Floor rail, 14...
- Wide hole in the middle, 16... Lip for holding, 17... Narrow space in the middle, 18... Housing, 22... Lateral hole, 24...
Mounting plate, 26... Rail upper surface, 28... Spacing member, 2
9... Stud, 30... Outer support plate, 32... Inner support plate, 34... Front outward projection, 36... Rear outward projection, 38... Pivotal pin, 40... Enlargement Hole, 44...
- Front projection, 46... Rear projection, 48... Pivot pin, 50... Enlarged hole, 54... Pin, 56... Curved red raising member, 58... Handle, 60... Pivot pin, 62
... Stop pin, 64 ... Flat end surface, 66 ... Wear plate, 70 ... Pin, 72 ... Shoulder portion, 74 ... Spring. Uchika No/Number of strokes 2 Uchikami 3 Uchika Yuto Uta J Sword singer customer〆&〆8 Number of strokes 9

Claims (1)

Claims: 1. A bottom wall portion, a vertical side portion, and a side edge of a longitudinal slot carried by the side portions and spaced from and overlying the bottom portion to define one hole passageway. and a top wall portion having a plurality of retaining lips and a concave portion formed on both side edges of the slot, the retaining lip 4 an elongated housing having a length at least equal to the axial distance of the individual pieces; a hole provided in the upper portion of the housing for securing the load; first and second support plates disposed within the housing; 1, carried by a second support plate, vertically penetrating and descending through a plurality of concave portions of the track, moving axially along the track together with the housing to be brought to the underside of the retaining lip, and facing upward; a plurality of ear members for restricting movement; and a plurality of ear members attached to the housing that move downwardly into two of the plurality of concave portions of the track when the ear members are positioned below the retaining lip. a pair of spring-loaded pins mounted to the housing and spaced apart along the length of the housing for contacting the edges of the concave portion to limit horizontal movement of the mounting device within the track; one for pivotally supporting a first support plate carrying ear members that are engaged with first and third lip portions of the rail, and a second one that is engaged with second and fourth lip portions of the rail. and a lateral pivot member for pivotally supporting a second support plate carrying a mating ear portion. 2. Each of said first and second support plates includes a hole surrounding and having a larger diameter than the other pivot member and spaced apart from its own pivot member; 2. A rail attachment device according to claim 1, wherein the rail attachment device is adapted to be alternately contacted with the other pivot member in order to limit the range of dynamic movement. 3. The rail attachment device according to claim 1 or 2, wherein the pair of outer support plates are attached to the housing and are configured to swing by a pivot member that pivots the support plates. . 4. The rail mounting according to claim 3, wherein the ear members of the inner support plate extend to the outside of the support plate, while the ear members of the outer support plate extend only to the outside of the support plate. Device. 5. The rail according to any one of claims 1 to 4, wherein the pin is configured to have a bifurcated lower end extending above the outer edge of the support plate. mounting device.